High-sales water replenishment pipe 4G0 121 081 AL for C7

Core Selling Points

Fast-moving cooling consumable ideal for combined one-stop purchasing

100% OE identical precision dimension, direct plug-and-play installation without modification

Applicable Vehicle & Engine Scope

• Matched Core Engine: EA888 Gen2 2.0 TFSI turbo gasoline engine
• Main Applicable Chassis: Audi C7 (4G) A6 / A6L Sedan & Avant
• Compatible Models: Audi A6 C7 FWD / Quattro 2.0T (2012–2015 production years)
• Installation Position: Connect auxiliary coolant expansion tank to radiator overflow channel (coolant replenishment & pressure balance pipeline)

Reinforced Durable Structural Design

1. Glass fiber reinforced hard plastic pipe + EPDM soft rubber composite joint: High heat resistance, anti-aging, resistant to long-term erosion by ethylene glycol coolant, not easy to crack or deform
2. Integrated one-piece injection molding process: Hard pipe and soft rubber transition section tightly fused, no separation or liquid seepage at joints
3. Original matched quick-lock snap connectors: Built-in integrated sealing rings, tight locking without liquid leakage under vehicle vibration
4. Wear-resistant woven heat insulation sleeve at bending section: Avoid friction damage from engine peripheral parts
5. Pre-installed fixed positioning buckles: Clamp onto factory reserved mounting points, prevent pipeline shaking and abrasion

Core Functions & Cooling System Protection

1. Balance internal pressure of the expansion tank, guide overflow coolant back to radiator circulation loop and supplement cooling liquid automatically
2. Eliminate hidden danger of coolant loss caused by pipe cracking, lock engine operating temperature within optimal range
3. Speed up cold vehicle warm-up efficiency, improve warm air output in low-temperature environments
4. Protect cylinder head, turbocharger and other core components from permanent damage due to high-temperature overheating

Fully Resolve Common Pipe Failure Symptoms

• Slow coolant consumption, frequent antifreeze topping up needed
• Coolant wet stains and seepage traces around the expansion tank
• Dashboard water temperature gauge fluctuates abnormally, random overheating warning
• Extremely slow warm-up speed, weak heating effect inside the car in winter
• Aging pipeline bulges, risk of sudden burst leading to massive coolant loss

Rigorous Multi-stage Factory Testing & Ample Spot Inventory